In the Southwest, modern interior design is common: white walls, black metal railings, open spaces, and… staircases that connect the floors like a natural air chimney. It is precisely in this type of residential environment that we recently installed a Fujitsu wall-mounted heat pump , designed to provide consistent comfort on multiple levels without compromising aesthetics.
Here, the objective was clear: to efficiently cool in the summer, to comfortably heat in the winter , and above all to standardize the temperature between the bottom and top of the stairs — a frequent challenge in townhouses and multi-story condos.
Why a wall-mounted heat pump in a space with landings and stairs?
An open staircase often creates two problems:
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Air stratification : warm air naturally rises, and cool air “falls” — but not always where it is needed.
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Uncomfortable zones : one floor may become overheated while the other remains too cool.
The solution isn't simply to install a "more powerful" unit. The key is to position the indoor unit correctly and optimize airflow.
In this project, the wall-mounted unit was installed high up, above the landing , in order to:
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project the air in a controlled manner along the volume,
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better “attach” the stairwell (traffic effect),
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limit dead zones (hot/cold corners).
The unit installed: Fujitsu, a sure bet for Montreal
The brand to respect for this project is Fujitsu — and it is particularly relevant in Greater Montreal, where temperature variations are marked.
In this installation, we opted for a configuration consistent with Fujitsu's current residential product lines, including a Fujitsu Altair wall-mounted heat pump (e.g., Altair 500 – KPAS, R-32) , known for:
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its heating performance for our winters,
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its excellent modulation control (more stable comfort),
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its discreet operation,
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its reliability in residential use.
Even when the exact model is not legible in the photo, the AirGreen approach remains the same: to offer a realistic, consistent option adapted to the type of dwelling, the volume of air and the actual needs of the customer.
Visible installation details and technical choices (what makes the difference)
The image shows a clean and minimalist setup, typical of a contemporary interior in the Southwest:
1) High positioning on the wall, near the ceiling
This is a key point: the higher the unit is placed, the better the air jet's range and the more effective the air circulation. In a stairwell, this helps stabilize the differences in temperature between floors.
2) Targeted air diffusion to "work" the staircase
The air outlet flap is adjustable: we adjust the direction to avoid an unpleasant direct blow and to favor an enveloping circulation .
3) Working at height with secure access
The use of ladders is clearly evident: in this type of location, the quality of the installation also depends on safety, precision, and anchoring. A unit that is poorly secured to a high wall will cause noise, vibrations… and problems in the medium term.
4) Routing of connections and visual finish
In projects where aesthetics matter (which is almost always the case in Montreal, especially in the Southwest), we aim for:
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a transition of connections that is as discreet as possible,
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a clean and symmetrical alignment,
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an installation that “blends” into the surroundings.
The real issue: everyday comfort, not just temperature
A properly installed wall-mounted heat pump isn't just about "it's 21°C". It's about:
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fewer fluctuations (we don't go from too hot to too cold),
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Less noise (stable installation + intelligent settings),
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less dry air in winter thanks to regular heating,
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a better feeling of comfort as soon as you move between floors.
In a house/condo with stairs, the main goal is to avoid:
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an overly hot room upstairs
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a living room that was too cool downstairs
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and the temptation to overcompensate (which increases the bill).
Good practices that we systematically apply (and which protect the client)
Here's what we check and adjust on this type of installation:
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Height and clearances : for efficient air intake and easy maintenance.
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Tilt and drainage : reliable condensate management (essential in air conditioning).
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Vibration reduction : fixings, leveling, support stability.
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Broadcast settings : stream direction, modes, speeds, scheduling.
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Usage tips : how to achieve comfort without over-consuming.
Why this type of installation is particularly popular in the Southwest
The Southwest is a mix of:
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modern condos,
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renovated townhouses,
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transformed plex,
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open-plan spaces with a mezzanine.
And in all these cases, the wall-mounted heat pump becomes an ideal solution because it:
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It can be installed without redoing the entire ventilation system.
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offers excellent performance
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takes up little space,
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provides heating and air conditioning in a single system.
Conclusion: a well-positioned Fujitsu = multi-story comfort, without compromise
In this project, the installation of the Fujitsu wall-mounted heat pump above the stair landing provides much more consistent comfort between levels, while maintaining a clean and discreet finish — exactly what is sought in a contemporary interior in Greater Montreal.
At AirGreen , our strength lies in combining:
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a perfect pose ,
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logical technical choices ,
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and a vision of “real comfort” (not just numbers).